<p>Hi all!!<br>
Thanks for replying and help me! My camera is a Canon ESO 1000F an the problem seems to be what Brad said. This problem occurs in a different way between pictures (seems that the black part of the picture change with shutter speed). I show you two more examples that I think confirm the problem. But, I am curious because that happens only in 1/3 of my film, and the light conditions where almost identical. <br>
<img src="http://d6d2h4gfvy8t8.cloudfront.net/18247305-lg.jpg" alt="" width="592" height="400" /></p>
<p><img src="http://d6d2h4gfvy8t8.cloudfront.net/18247307-lg.jpg" alt="" width="592" height="400" /></p>
<p> </p>